5896d289f9ac3d28238b40dc913e30e03347d9c5
[linux-2.6.git] / sound / pci / via82xx_modem.c
1 /*
2  *   ALSA modem driver for VIA VT82xx (South Bridge)
3  *
4  *   VT82C686A/B/C, VT8233A/C, VT8235
5  *
6  *      Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
8  *                    2002 Takashi Iwai <tiwai@suse.de>
9  *
10  *   This program is free software; you can redistribute it and/or modify
11  *   it under the terms of the GNU General Public License as published by
12  *   the Free Software Foundation; either version 2 of the License, or
13  *   (at your option) any later version.
14  *
15  *   This program is distributed in the hope that it will be useful,
16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *   GNU General Public License for more details.
19  *
20  *   You should have received a copy of the GNU General Public License
21  *   along with this program; if not, write to the Free Software
22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23  *
24  */
25
26 /*
27  * Changes:
28  *
29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@smlink.com>
30  *      Modified from original audio driver 'via82xx.c' to support AC97
31  *      modems.
32  */
33
34 #include <sound/driver.h>
35 #include <asm/io.h>
36 #include <linux/delay.h>
37 #include <linux/interrupt.h>
38 #include <linux/init.h>
39 #include <linux/pci.h>
40 #include <linux/slab.h>
41 #include <linux/moduleparam.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/info.h>
46 #include <sound/ac97_codec.h>
47 #include <sound/initval.h>
48
49 #if 0
50 #define POINTER_DEBUG
51 #endif
52
53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
54 MODULE_DESCRIPTION("VIA VT82xx modem");
55 MODULE_LICENSE("GPL");
56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
57
58 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
59 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
60 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
61 static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
62
63 module_param_array(index, int, NULL, 0444);
64 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
65 module_param_array(id, charp, NULL, 0444);
66 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
67 module_param_array(enable, bool, NULL, 0444);
68 MODULE_PARM_DESC(enable, "Enable modem part of VIA 82xx bridge.");
69 module_param_array(ac97_clock, int, NULL, 0444);
70 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
71
72
73 /*
74  *  Direct registers
75  */
76
77 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
78 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
79
80 /* common offsets */
81 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
82 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
83 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
84 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
85 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
86 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
87 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
88 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
89 #define   VIA_REG_CTRL_START            0x80    /* WO */
90 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
91 #define   VIA_REG_CTRL_AUTOSTART        0x20
92 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
93 #define   VIA_REG_CTRL_INT_STOP         0x04            
94 #define   VIA_REG_CTRL_INT_EOL          0x02
95 #define   VIA_REG_CTRL_INT_FLAG         0x01
96 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
97 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
98 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
99 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
100 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
101 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
102 #define   VIA_REG_TYPE_INT_LLINE        0x00
103 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
104 #define   VIA_REG_TYPE_INT_LESSONE      0x08
105 #define   VIA_REG_TYPE_INT_MASK         0x0c
106 #define   VIA_REG_TYPE_INT_EOL          0x02
107 #define   VIA_REG_TYPE_INT_FLAG         0x01
108 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
109 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
110 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
111 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
112 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
113
114 #define DEFINE_VIA_REGSET(name,val) \
115 enum {\
116         VIA_REG_##name##_STATUS         = (val),\
117         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
118         VIA_REG_##name##_TYPE           = (val) + 0x02,\
119         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
120         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
121         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
122         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
123 }
124
125 /* modem block */
126 DEFINE_VIA_REGSET(MO, 0x40);
127 DEFINE_VIA_REGSET(MI, 0x50);
128
129 /* AC'97 */
130 #define VIA_REG_AC97                    0x80    /* dword */
131 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
132 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
133 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
134 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
135 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
136 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
137 #define   VIA_REG_AC97_BUSY             (1<<24)
138 #define   VIA_REG_AC97_READ             (1<<23)
139 #define   VIA_REG_AC97_CMD_SHIFT        16
140 #define   VIA_REG_AC97_CMD_MASK         0x7e
141 #define   VIA_REG_AC97_DATA_SHIFT       0
142 #define   VIA_REG_AC97_DATA_MASK        0xffff
143
144 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
145 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
146 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
147 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
148 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
149 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
150 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
151 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
152 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
153 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
154 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
155 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
156 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
157 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
158 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
159 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
160 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
161 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
162 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
163 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
164 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
165
166 #define VIA_REG_GPI_STATUS              0x88
167 #define VIA_REG_GPI_INTR                0x8c
168
169 #define VIA_TBL_BIT_FLAG        0x40000000
170 #define VIA_TBL_BIT_EOL         0x80000000
171
172 /* pci space */
173 #define VIA_ACLINK_STAT         0x40
174 #define  VIA_ACLINK_C11_READY   0x20
175 #define  VIA_ACLINK_C10_READY   0x10
176 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
177 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
178 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
179 #define VIA_ACLINK_CTRL         0x41
180 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
181 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
182 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
183 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
184 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
185 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
186 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
187 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
188 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
189                                  VIA_ACLINK_CTRL_RESET|\
190                                  VIA_ACLINK_CTRL_PCM)
191 #define VIA_FUNC_ENABLE         0x42
192 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
193 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
194 #define  VIA_FUNC_RX2C_WRITE    0x20
195 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
196 #define  VIA_FUNC_ENABLE_GAME   0x08
197 #define  VIA_FUNC_ENABLE_FM     0x04
198 #define  VIA_FUNC_ENABLE_MIDI   0x02
199 #define  VIA_FUNC_ENABLE_SB     0x01
200 #define VIA_PNP_CONTROL         0x43
201 #define VIA_MC97_CTRL           0x44
202 #define  VIA_MC97_CTRL_ENABLE   0x80
203 #define  VIA_MC97_CTRL_SECONDARY 0x40
204 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
205                                  VIA_MC97_CTRL_SECONDARY)
206
207
208 typedef struct _snd_via82xx_modem via82xx_t;
209 typedef struct via_dev viadev_t;
210
211 /*
212  * pcm stream
213  */
214
215 struct snd_via_sg_table {
216         unsigned int offset;
217         unsigned int size;
218 } ;
219
220 #define VIA_TABLE_SIZE  255
221
222 struct via_dev {
223         unsigned int reg_offset;
224         unsigned long port;
225         int direction;  /* playback = 0, capture = 1 */
226         snd_pcm_substream_t *substream;
227         int running;
228         unsigned int tbl_entries; /* # descriptors */
229         struct snd_dma_buffer table;
230         struct snd_via_sg_table *idx_table;
231         /* for recovery from the unexpected pointer */
232         unsigned int lastpos;
233         unsigned int bufsize;
234         unsigned int bufsize2;
235 };
236
237 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
238
239 #define VIA_MAX_MODEM_DEVS      2
240
241 struct _snd_via82xx_modem {
242         int irq;
243
244         unsigned long port;
245
246         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
247
248         struct pci_dev *pci;
249         snd_card_t *card;
250
251         unsigned int num_devs;
252         unsigned int playback_devno, capture_devno;
253         viadev_t devs[VIA_MAX_MODEM_DEVS];
254
255         snd_pcm_t *pcms[2];
256
257         ac97_bus_t *ac97_bus;
258         ac97_t *ac97;
259         unsigned int ac97_clock;
260         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
261
262         spinlock_t reg_lock;
263         snd_info_entry_t *proc_entry;
264 };
265
266 static struct pci_device_id snd_via82xx_modem_ids[] = {
267         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
268         { 0, }
269 };
270
271 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
272
273 /*
274  */
275
276 /*
277  * allocate and initialize the descriptor buffers
278  * periods = number of periods
279  * fragsize = period size in bytes
280  */
281 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
282                            struct pci_dev *pci,
283                            unsigned int periods, unsigned int fragsize)
284 {
285         unsigned int i, idx, ofs, rest;
286         via82xx_t *chip = snd_pcm_substream_chip(substream);
287         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
288
289         if (dev->table.area == NULL) {
290                 /* the start of each lists must be aligned to 8 bytes,
291                  * but the kernel pages are much bigger, so we don't care
292                  */
293                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
294                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
295                                         &dev->table) < 0)
296                         return -ENOMEM;
297         }
298         if (! dev->idx_table) {
299                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
300                 if (! dev->idx_table)
301                         return -ENOMEM;
302         }
303
304         /* fill the entries */
305         idx = 0;
306         ofs = 0;
307         for (i = 0; i < periods; i++) {
308                 rest = fragsize;
309                 /* fill descriptors for a period.
310                  * a period can be split to several descriptors if it's
311                  * over page boundary.
312                  */
313                 do {
314                         unsigned int r;
315                         unsigned int flag;
316
317                         if (idx >= VIA_TABLE_SIZE) {
318                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
319                                 return -EINVAL;
320                         }
321                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
322                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
323                         if (rest < r)
324                                 r = rest;
325                         rest -= r;
326                         if (! rest) {
327                                 if (i == periods - 1)
328                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
329                                 else
330                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
331                         } else
332                                 flag = 0; /* period continues to the next */
333                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
334                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
335                         dev->idx_table[idx].offset = ofs;
336                         dev->idx_table[idx].size = r;
337                         ofs += r;
338                         idx++;
339                 } while (rest > 0);
340         }
341         dev->tbl_entries = idx;
342         dev->bufsize = periods * fragsize;
343         dev->bufsize2 = dev->bufsize / 2;
344         return 0;
345 }
346
347
348 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
349                            struct pci_dev *pci)
350 {
351         if (dev->table.area) {
352                 snd_dma_free_pages(&dev->table);
353                 dev->table.area = NULL;
354         }
355         kfree(dev->idx_table);
356         dev->idx_table = NULL;
357         return 0;
358 }
359
360 /*
361  *  Basic I/O
362  */
363
364 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
365 {
366         return inl(VIAREG(chip, AC97));
367 }
368  
369 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
370 {
371         outl(val, VIAREG(chip, AC97));
372 }
373  
374 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
375 {
376         unsigned int timeout = 1000;    /* 1ms */
377         unsigned int val;
378         
379         while (timeout-- > 0) {
380                 udelay(1);
381                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
382                         return val & 0xffff;
383         }
384         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
385         return -EIO;
386 }
387  
388 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
389 {
390         unsigned int timeout = 1000;    /* 1ms */
391         unsigned int val, val1;
392         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
393                                          VIA_REG_AC97_SECONDARY_VALID;
394         
395         while (timeout-- > 0) {
396                 val = snd_via82xx_codec_xread(chip);
397                 val1 = val & (VIA_REG_AC97_BUSY | stat);
398                 if (val1 == stat)
399                         return val & 0xffff;
400                 udelay(1);
401         }
402         return -EIO;
403 }
404  
405 static void snd_via82xx_codec_wait(ac97_t *ac97)
406 {
407         via82xx_t *chip = ac97->private_data;
408         int err;
409         err = snd_via82xx_codec_ready(chip, ac97->num);
410         /* here we need to wait fairly for long time.. */
411         set_current_state(TASK_UNINTERRUPTIBLE);
412         schedule_timeout(HZ/2);
413 }
414
415 static void snd_via82xx_codec_write(ac97_t *ac97,
416                                     unsigned short reg,
417                                     unsigned short val)
418 {
419         via82xx_t *chip = ac97->private_data;
420         unsigned int xval;
421         if(reg == AC97_GPIO_STATUS) {
422                 outl(val, VIAREG(chip, GPI_STATUS));
423                 return;
424         }       
425         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
426         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
427         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
428         xval |= val << VIA_REG_AC97_DATA_SHIFT;
429         snd_via82xx_codec_xwrite(chip, xval);
430         snd_via82xx_codec_ready(chip, ac97->num);
431 }
432
433 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
434 {
435         via82xx_t *chip = ac97->private_data;
436         unsigned int xval, val = 0xffff;
437         int again = 0;
438
439         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
440         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
441         xval |= VIA_REG_AC97_READ;
442         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
443         while (1) {
444                 if (again++ > 3) {
445                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
446                         return 0xffff;
447                 }
448                 snd_via82xx_codec_xwrite(chip, xval);
449                 udelay (20);
450                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
451                         udelay(25);
452                         val = snd_via82xx_codec_xread(chip);
453                         break;
454                 }
455         }
456         return val & 0xffff;
457 }
458
459 static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
460 {
461         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
462              VIADEV_REG(viadev, OFFSET_CONTROL));
463         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
464         udelay(50);
465         /* disable interrupts */
466         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
467         /* clear interrupts */
468         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
469         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
470         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
471         viadev->lastpos = 0;
472 }
473
474
475 /*
476  *  Interrupt handler
477  */
478
479 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
480 {
481         via82xx_t *chip = dev_id;
482         unsigned int status;
483         unsigned int i;
484
485         status = inl(VIAREG(chip, SGD_SHADOW));
486         if (! (status & chip->intr_mask)) {
487                 return IRQ_NONE;
488         }
489 // _skip_sgd:
490
491         /* check status for each stream */
492         spin_lock(&chip->reg_lock);
493         for (i = 0; i < chip->num_devs; i++) {
494                 viadev_t *viadev = &chip->devs[i];
495                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
496                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
497                 if (! c_status)
498                         continue;
499                 if (viadev->substream && viadev->running) {
500                         spin_unlock(&chip->reg_lock);
501                         snd_pcm_period_elapsed(viadev->substream);
502                         spin_lock(&chip->reg_lock);
503                 }
504                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
505         }
506         spin_unlock(&chip->reg_lock);
507         return IRQ_HANDLED;
508 }
509
510 /*
511  *  PCM callbacks
512  */
513
514 /*
515  * trigger callback
516  */
517 static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
518 {
519         via82xx_t *chip = snd_pcm_substream_chip(substream);
520         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
521         unsigned char val = 0;
522
523         switch (cmd) {
524         case SNDRV_PCM_TRIGGER_START:
525                 val |= VIA_REG_CTRL_START;
526                 viadev->running = 1;
527                 break;
528         case SNDRV_PCM_TRIGGER_STOP:
529                 val = VIA_REG_CTRL_TERMINATE;
530                 viadev->running = 0;
531                 break;
532         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
533                 val |= VIA_REG_CTRL_PAUSE;
534                 viadev->running = 0;
535                 break;
536         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
537                 viadev->running = 1;
538                 break;
539         default:
540                 return -EINVAL;
541         }
542         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
543         if (cmd == SNDRV_PCM_TRIGGER_STOP)
544                 snd_via82xx_channel_reset(chip, viadev);
545         return 0;
546 }
547
548 /*
549  * pointer callbacks
550  */
551
552 /*
553  * calculate the linear position at the given sg-buffer index and the rest count
554  */
555
556 #define check_invalid_pos(viadev,pos) \
557         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
558
559 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
560 {
561         unsigned int size, res;
562
563         size = viadev->idx_table[idx].size;
564         res = viadev->idx_table[idx].offset + size - count;
565
566         /* check the validity of the calculated position */
567         if (size < count) {
568                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
569                 res = viadev->lastpos;
570         } else if (check_invalid_pos(viadev, res)) {
571 #ifdef POINTER_DEBUG
572                 printk("fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
573 #endif
574                 if (count && size < count) {
575                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
576                         res = viadev->lastpos;
577                 } else {
578                         if (! count)
579                                 /* bogus count 0 on the DMA boundary? */
580                                 res = viadev->idx_table[idx].offset;
581                         else
582                                 /* count register returns full size when end of buffer is reached */
583                                 res = viadev->idx_table[idx].offset + size;
584                         if (check_invalid_pos(viadev, res)) {
585                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
586                                 res = viadev->lastpos;
587                         }
588                 }
589         }
590         viadev->lastpos = res; /* remember the last position */
591         if (res >= viadev->bufsize)
592                 res -= viadev->bufsize;
593         return res;
594 }
595
596 /*
597  * get the current pointer on via686
598  */
599 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
600 {
601         via82xx_t *chip = snd_pcm_substream_chip(substream);
602         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
603         unsigned int idx, ptr, count, res;
604
605         snd_assert(viadev->tbl_entries, return 0);
606         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
607                 return 0;
608
609         spin_lock(&chip->reg_lock);
610         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
611         /* The via686a does not have the current index register,
612          * so we need to calculate the index from CURR_PTR.
613          */
614         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
615         if (ptr <= (unsigned int)viadev->table.addr)
616                 idx = 0;
617         else /* CURR_PTR holds the address + 8 */
618                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
619         res = calc_linear_pos(viadev, idx, count);
620         spin_unlock(&chip->reg_lock);
621
622         return bytes_to_frames(substream->runtime, res);
623 }
624
625 /*
626  * hw_params callback:
627  * allocate the buffer and build up the buffer description table
628  */
629 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
630                                  snd_pcm_hw_params_t * hw_params)
631 {
632         via82xx_t *chip = snd_pcm_substream_chip(substream);
633         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
634         int err;
635
636         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
637         if (err < 0)
638                 return err;
639         err = build_via_table(viadev, substream, chip->pci,
640                               params_periods(hw_params),
641                               params_period_bytes(hw_params));
642         if (err < 0)
643                 return err;
644
645         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
646         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
647
648         return 0;
649 }
650
651 /*
652  * hw_free callback:
653  * clean up the buffer description table and release the buffer
654  */
655 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
656 {
657         via82xx_t *chip = snd_pcm_substream_chip(substream);
658         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
659
660         clean_via_table(viadev, substream, chip->pci);
661         snd_pcm_lib_free_pages(substream);
662         return 0;
663 }
664
665
666 /*
667  * set up the table pointer
668  */
669 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
670 {
671         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
672         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
673         udelay(20);
674         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
675 }
676
677 /*
678  * prepare callback for playback and capture
679  */
680 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
681 {
682         via82xx_t *chip = snd_pcm_substream_chip(substream);
683         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
684
685         snd_via82xx_channel_reset(chip, viadev);
686         /* this must be set after channel_reset */
687         snd_via82xx_set_table_ptr(chip, viadev);
688         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
689              VIADEV_REG(viadev, OFFSET_TYPE));
690         return 0;
691 }
692
693 /*
694  * pcm hardware definition, identical for both playback and capture
695  */
696 static snd_pcm_hardware_t snd_via82xx_hw =
697 {
698         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
699                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
700                                  SNDRV_PCM_INFO_MMAP_VALID |
701                                  SNDRV_PCM_INFO_RESUME |
702                                  SNDRV_PCM_INFO_PAUSE),
703         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
704         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
705         .rate_min =             8000,
706         .rate_max =             16000,
707         .channels_min =         1,
708         .channels_max =         1,
709         .buffer_bytes_max =     128 * 1024,
710         .period_bytes_min =     32,
711         .period_bytes_max =     128 * 1024,
712         .periods_min =          2,
713         .periods_max =          VIA_TABLE_SIZE / 2,
714         .fifo_size =            0,
715 };
716
717
718 /*
719  * open callback skeleton
720  */
721 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
722 {
723         snd_pcm_runtime_t *runtime = substream->runtime;
724         int err;
725         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
726         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
727                 .count = ARRAY_SIZE(rates),
728                 .list = rates,
729                 .mask = 0,
730         };
731
732         runtime->hw = snd_via82xx_hw;
733         
734         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
735                 return err;
736
737         /* we may remove following constaint when we modify table entries
738            in interrupt */
739         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
740                 return err;
741
742         runtime->private_data = viadev;
743         viadev->substream = substream;
744
745         return 0;
746 }
747
748
749 /*
750  * open callback for playback
751  */
752 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
753 {
754         via82xx_t *chip = snd_pcm_substream_chip(substream);
755         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
756
757         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
758 }
759
760 /*
761  * open callback for capture
762  */
763 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
764 {
765         via82xx_t *chip = snd_pcm_substream_chip(substream);
766         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
767
768         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
769 }
770
771 /*
772  * close callback
773  */
774 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
775 {
776         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
777
778         viadev->substream = NULL;
779         return 0;
780 }
781
782
783 /* via686 playback callbacks */
784 static snd_pcm_ops_t snd_via686_playback_ops = {
785         .open =         snd_via82xx_playback_open,
786         .close =        snd_via82xx_pcm_close,
787         .ioctl =        snd_pcm_lib_ioctl,
788         .hw_params =    snd_via82xx_hw_params,
789         .hw_free =      snd_via82xx_hw_free,
790         .prepare =      snd_via82xx_pcm_prepare,
791         .trigger =      snd_via82xx_pcm_trigger,
792         .pointer =      snd_via686_pcm_pointer,
793         .page =         snd_pcm_sgbuf_ops_page,
794 };
795
796 /* via686 capture callbacks */
797 static snd_pcm_ops_t snd_via686_capture_ops = {
798         .open =         snd_via82xx_capture_open,
799         .close =        snd_via82xx_pcm_close,
800         .ioctl =        snd_pcm_lib_ioctl,
801         .hw_params =    snd_via82xx_hw_params,
802         .hw_free =      snd_via82xx_hw_free,
803         .prepare =      snd_via82xx_pcm_prepare,
804         .trigger =      snd_via82xx_pcm_trigger,
805         .pointer =      snd_via686_pcm_pointer,
806         .page =         snd_pcm_sgbuf_ops_page,
807 };
808
809
810 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
811 {
812         chip->devs[idx].reg_offset = reg_offset;
813         chip->devs[idx].direction = direction;
814         chip->devs[idx].port = chip->port + reg_offset;
815 }
816
817 /*
818  * create a pcm instance for via686a/b
819  */
820 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
821 {
822         snd_pcm_t *pcm;
823         int err;
824
825         chip->playback_devno = 0;
826         chip->capture_devno = 1;
827         chip->num_devs = 2;
828         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
829
830         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
831         if (err < 0)
832                 return err;
833         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
834         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
835         pcm->private_data = chip;
836         strcpy(pcm->name, chip->card->shortname);
837         chip->pcms[0] = pcm;
838         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
839         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
840
841         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
842                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
843                 return err;
844
845         return 0;
846 }
847
848
849 /*
850  *  Mixer part
851  */
852
853
854 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
855 {
856         via82xx_t *chip = bus->private_data;
857         chip->ac97_bus = NULL;
858 }
859
860 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
861 {
862         via82xx_t *chip = ac97->private_data;
863         chip->ac97 = NULL;
864 }
865
866
867 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
868 {
869         ac97_template_t ac97;
870         int err;
871         static ac97_bus_ops_t ops = {
872                 .write = snd_via82xx_codec_write,
873                 .read = snd_via82xx_codec_read,
874                 .wait = snd_via82xx_codec_wait,
875         };
876
877         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
878                 return err;
879         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
880         chip->ac97_bus->clock = chip->ac97_clock;
881         chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
882
883         memset(&ac97, 0, sizeof(ac97));
884         ac97.private_data = chip;
885         ac97.private_free = snd_via82xx_mixer_free_ac97;
886         ac97.pci = chip->pci;
887         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
888         ac97.num = chip->ac97_secondary;
889
890         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
891                 return err;
892
893         return 0;
894 }
895
896
897 /*
898  * proc interface
899  */
900 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
901 {
902         via82xx_t *chip = entry->private_data;
903         int i;
904         
905         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
906         for (i = 0; i < 0xa0; i += 4) {
907                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
908         }
909 }
910
911 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
912 {
913         snd_info_entry_t *entry;
914
915         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
916                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
917 }
918
919 /*
920  *
921  */
922
923 static int snd_via82xx_chip_init(via82xx_t *chip)
924 {
925         unsigned int val;
926         int max_count;
927         unsigned char pval;
928
929         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
930         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
931                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
932                 udelay(100);
933         }
934
935         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
936         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
937                 /* deassert ACLink reset, force SYNC */
938                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
939                                       VIA_ACLINK_CTRL_ENABLE |
940                                       VIA_ACLINK_CTRL_RESET |
941                                       VIA_ACLINK_CTRL_SYNC);
942                 udelay(100);
943 #if 1 /* FIXME: should we do full reset here for all chip models? */
944                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
945                 udelay(100);
946 #else
947                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
948                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
949                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
950                 udelay(2);
951 #endif
952                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
953                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
954                 udelay(100);
955         }
956         
957         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
958         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
959                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
960                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
961                 udelay(100);
962         }
963
964         /* wait until codec ready */
965         max_count = ((3 * HZ) / 4) + 1;
966         do {
967                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
968                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
969                         break;
970                 set_current_state(TASK_UNINTERRUPTIBLE);
971                 schedule_timeout(1);
972         } while (--max_count > 0);
973
974         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
975                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
976
977         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
978                                  VIA_REG_AC97_SECONDARY_VALID |
979                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
980         max_count = ((3 * HZ) / 4) + 1;
981         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
982                                  VIA_REG_AC97_SECONDARY_VALID |
983                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
984         do {
985                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
986                         chip->ac97_secondary = 1;
987                         goto __ac97_ok2;
988                 }
989                 set_current_state(TASK_INTERRUPTIBLE);
990                 schedule_timeout(1);
991         } while (--max_count > 0);
992         /* This is ok, the most of motherboards have only one codec */
993
994       __ac97_ok2:
995
996         /* route FM trap to IRQ, disable FM trap */
997         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
998         /* disable all GPI interrupts */
999         outl(0, VIAREG(chip, GPI_INTR));
1000
1001         return 0;
1002 }
1003
1004 #ifdef CONFIG_PM
1005 /*
1006  * power management
1007  */
1008 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1009 {
1010         via82xx_t *chip = card->pm_private_data;
1011         int i;
1012
1013         for (i = 0; i < 2; i++)
1014                 if (chip->pcms[i])
1015                         snd_pcm_suspend_all(chip->pcms[i]);
1016         for (i = 0; i < chip->num_devs; i++)
1017                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1018         synchronize_irq(chip->irq);
1019         snd_ac97_suspend(chip->ac97);
1020         pci_set_power_state(chip->pci, 3);
1021         pci_disable_device(chip->pci);
1022         return 0;
1023 }
1024
1025 static int snd_via82xx_resume(snd_card_t *card)
1026 {
1027         via82xx_t *chip = card->pm_private_data;
1028         int i;
1029
1030         pci_enable_device(chip->pci);
1031         pci_set_power_state(chip->pci, 0);
1032         pci_set_master(chip->pci);
1033
1034         snd_via82xx_chip_init(chip);
1035
1036         snd_ac97_resume(chip->ac97);
1037
1038         for (i = 0; i < chip->num_devs; i++)
1039                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1040
1041         return 0;
1042 }
1043 #endif /* CONFIG_PM */
1044
1045 static int snd_via82xx_free(via82xx_t *chip)
1046 {
1047         unsigned int i;
1048
1049         if (chip->irq < 0)
1050                 goto __end_hw;
1051         /* disable interrupts */
1052         for (i = 0; i < chip->num_devs; i++)
1053                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1054         synchronize_irq(chip->irq);
1055       __end_hw:
1056         if (chip->irq >= 0)
1057                 free_irq(chip->irq, (void *)chip);
1058         pci_release_regions(chip->pci);
1059         pci_disable_device(chip->pci);
1060         kfree(chip);
1061         return 0;
1062 }
1063
1064 static int snd_via82xx_dev_free(snd_device_t *device)
1065 {
1066         via82xx_t *chip = device->device_data;
1067         return snd_via82xx_free(chip);
1068 }
1069
1070 static int __devinit snd_via82xx_create(snd_card_t * card,
1071                                         struct pci_dev *pci,
1072                                         int chip_type,
1073                                         int revision,
1074                                         unsigned int ac97_clock,
1075                                         via82xx_t ** r_via)
1076 {
1077         via82xx_t *chip;
1078         int err;
1079         static snd_device_ops_t ops = {
1080                 .dev_free =     snd_via82xx_dev_free,
1081         };
1082
1083         if ((err = pci_enable_device(pci)) < 0)
1084                 return err;
1085
1086         if ((chip = kcalloc(1, sizeof(*chip), GFP_KERNEL)) == NULL) {
1087                 pci_disable_device(pci);
1088                 return -ENOMEM;
1089         }
1090
1091         spin_lock_init(&chip->reg_lock);
1092         chip->card = card;
1093         chip->pci = pci;
1094         chip->irq = -1;
1095
1096         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1097                 kfree(chip);
1098                 pci_disable_device(pci);
1099                 return err;
1100         }
1101         chip->port = pci_resource_start(pci, 0);
1102         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1103                         card->driver, (void *)chip)) {
1104                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1105                 snd_via82xx_free(chip);
1106                 return -EBUSY;
1107         }
1108         chip->irq = pci->irq;
1109         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1110                 chip->ac97_clock = ac97_clock;
1111         synchronize_irq(chip->irq);
1112
1113         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1114                 snd_via82xx_free(chip);
1115                 return err;
1116         }
1117
1118         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1119                 snd_via82xx_free(chip);
1120                 return err;
1121         }
1122
1123         /* The 8233 ac97 controller does not implement the master bit
1124          * in the pci command register. IMHO this is a violation of the PCI spec.
1125          * We call pci_set_master here because it does not hurt. */
1126         pci_set_master(pci);
1127
1128         snd_card_set_dev(card, &pci->dev);
1129
1130         *r_via = chip;
1131         return 0;
1132 }
1133
1134
1135 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1136                                        const struct pci_device_id *pci_id)
1137 {
1138         static int dev;
1139         snd_card_t *card;
1140         via82xx_t *chip;
1141         unsigned char revision;
1142         int chip_type = 0, card_type;
1143         unsigned int i;
1144         int err;
1145
1146         if (dev >= SNDRV_CARDS)
1147                 return -ENODEV;
1148         if (!enable[dev]) {
1149                 dev++;
1150                 return -ENOENT;
1151         }
1152
1153         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1154         if (card == NULL)
1155                 return -ENOMEM;
1156
1157         card_type = pci_id->driver_data;
1158         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1159         switch (card_type) {
1160         case TYPE_CARD_VIA82XX_MODEM:
1161                 strcpy(card->driver, "VIA82XX-MODEM");
1162                 sprintf(card->shortname, "VIA 82XX modem");
1163                 break;
1164         default:
1165                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1166                 err = -EINVAL;
1167                 goto __error;
1168         }
1169                 
1170         if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
1171                 goto __error;
1172         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1173                 goto __error;
1174
1175         if ((err = snd_via686_pcm_new(chip)) < 0 )
1176                 goto __error;
1177
1178         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1179
1180         /* disable interrupts */
1181         for (i = 0; i < chip->num_devs; i++)
1182                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1183
1184         sprintf(card->longname, "%s at 0x%lx, irq %d",
1185                 card->shortname, chip->port, chip->irq);
1186
1187         snd_via82xx_proc_init(chip);
1188
1189         if ((err = snd_card_register(card)) < 0) {
1190                 snd_card_free(card);
1191                 return err;
1192         }
1193         pci_set_drvdata(pci, card);
1194         dev++;
1195         return 0;
1196
1197  __error:
1198         snd_card_free(card);
1199         return err;
1200 }
1201
1202 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1203 {
1204         snd_card_free(pci_get_drvdata(pci));
1205         pci_set_drvdata(pci, NULL);
1206 }
1207
1208 static struct pci_driver driver = {
1209         .name = "VIA 82xx Modem",
1210         .id_table = snd_via82xx_modem_ids,
1211         .probe = snd_via82xx_probe,
1212         .remove = __devexit_p(snd_via82xx_remove),
1213         SND_PCI_PM_CALLBACKS
1214 };
1215
1216 static int __init alsa_card_via82xx_init(void)
1217 {
1218         return pci_register_driver(&driver);
1219 }
1220
1221 static void __exit alsa_card_via82xx_exit(void)
1222 {
1223         pci_unregister_driver(&driver);
1224 }
1225
1226 module_init(alsa_card_via82xx_init)
1227 module_exit(alsa_card_via82xx_exit)